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anonymous

  • one year ago

Help! Super easy!

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    i like easy questions !

  3. anonymous
    • one year ago
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    it is pretty easy right? use pythangoras to get the missing side

  4. anonymous
    • one year ago
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    \[y^2+84^2=85^2\] solve for \(y\)

  5. anonymous
    • one year ago
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    you good from there or you need steps?

  6. anonymous
    • one year ago
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    So what do I do with the number? Do I add them, subtract them or divide?

  7. anonymous
    • one year ago
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    order of operations

  8. anonymous
    • one year ago
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    ok lets take the steps

  9. anonymous
    • one year ago
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    you have one number on one side of the equals side what do you do to get them on the other?

  10. anonymous
    • one year ago
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    you can do the arithmetic at any time first, last, whatever lets do it first

  11. anonymous
    • one year ago
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    \[y^2+84^2=85^2\]square each (i used a calculator) to get \[y^2+7056=7225\]

  12. anonymous
    • one year ago
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    now two steps to find \(y\) first subtract \(7056\) from both sides \[y^2=7225-7056\\ y^2=169\]

  13. anonymous
    • one year ago
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    then take the square root of \(169\) to find \(y\)\[y=\sqrt{169}=13\]

  14. anonymous
    • one year ago
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    if you have to do a lot of these, there is another way you might get used to

  15. anonymous
    • one year ago
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    go right to \[y=\sqrt{85^2-84^2}\] and plug that (carefully) in to a calculator i use this http://www.wolframalpha.com/input/?i=sqrt%2885^2-84^2%29

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